1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Viktor [21]
3 years ago
15

Q 16.1: Select the first step in the Wittig reaction. A : The alkyltriphenylphosphonium halide is deprotonated by a base to make

a phosphorus ylide. B : The phosphorus ylide reacts with the aldehyde or ketone to make an oxaphosphetane. C : Triphenylphosphine attacks the alkyl halide to produce an alkyltriphenylphosphonium halide. D : The oxaphosphetane decomposes to form the alkene and triphenylphosphine oxide.
Chemistry
1 answer:
Dennis_Churaev [7]3 years ago
6 0

Answer:

The phosphorus ylide reacts with the aldehyde or ketone to make an oxaphosphetane.

Explanation:

The Wittig reaction is a reaction that occurs between a phosphorus ylide and an aldehyde or ketone. The final products are an alkene and triphenyl phosphine oxide.

The first step in the reaction is the attack of the phosphorus ylide on the aldehyde or ketone. This is followed by attack of oxygen on phosphorus to form a [2+2] cycloaddition product (oxaphosphetane)  which  decomposes to form the alkene and triphenylphosphine oxide.

You might be interested in
Please help fast. I will give brainliest.
Sonbull [250]

Answer:39 min

Explanation:

5 0
2 years ago
The density of water at 400C is 0.992 g/mL What is the volume of 27.0 g of water at this temperature?
pantera1 [17]

Answer:

Volume of water at this temperature is 27.2 mL

Explanation:

We know that density=\frac{mass}{volume}

Here density of water is 0.992 g/mL

Here mass of water is 27.0 g

So volume=\frac{mass}{density}

                         = \frac{27.0g}{0.992g/mL}

                         = 27.2 mL

7 0
3 years ago
While viruses are not living organisms, they do share some characteristics with living organisms such as bacteria and fungi. Whi
Rufina [12.5K]

viruses are made of proteins and contain genetic information to produce more of them in the form of DNA or RNA.

7 0
3 years ago
Read 2 more answers
Which of the following is not a property of a buffer solution? a) It is a mixture of a weak acid and its conjugate base. b) Resi
m_a_m_a [10]

Answer:

e) pH is independent of concentration.

Explanation:

a) It is a mixture of a weak acid and its conjugate base. <em>TRUE. </em>A buffer is defined as a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid.

b) Resists pH changes because it reacts with added acid or base. <em>TRUE. </em>Thermodynamically, the reaction of added acid or base is faster with the buffer mixture than with H⁺ or OH⁻ ions of the solutions.

c) The maximum buffer capacity is at pH = pKa. <em>TRUE. </em>The buffer capacity is pka±1. For this, buffer capacity is maximum in pka.

d) pH is dependent on the solution ionic strength and temperature. <em>TRUE.</em> Ionic strength and temperature are factors that influence concentrations of ions in solutions as the H⁺ ion that is the responsible

e) pH is independent of concentration. <em>FALSE. </em>pH in a buffer depends completely of concentrations of the acid and its conjugate base or vice versa.

I hope it helps!

8 0
3 years ago
Milk of magnesia helps to neutralize stomach acid because it is a
dimulka [17.4K]
*base
a base is added to an acid to neutralize it.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why are there two high tides a day about 12 hours apart?<br>​
    9·1 answer
  • If you pour hot soup into a bowl, and the bowl stays cool to the touch, you can assume that
    10·1 answer
  • Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 78 mL of wa
    10·1 answer
  • 2. What does the diamond-shaped symbol stand for in a consumer product label?
    9·1 answer
  • Manganese dioxide (MnO2(s), Hf = –520.0 kJ) reacts with aluminum to form aluminum oxide (AI2O3(s), Hf = –1699.8 kJ/mol) and mang
    11·1 answer
  • Two atoms of the same element are most likely to form
    10·1 answer
  • (1 pt) You have 250.0 mL of 0.136 M HCl. Using a volumetric pipet, you take 25.00 mL of that solution, place it in a 100.00 ml v
    11·1 answer
  • What’s the answer to the question
    13·2 answers
  • Milk is heterogeneous mixture why​
    6·2 answers
  • Fill in the blank.<br> 9.31x10^3 = [ ? ]x 10^5
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!